横向
1
Height above sea level
6
Imaginary line around the middle of Earth
7
Vast body of salt water
8
Large natural stream of water
9
Chain or group of islands
10
One of seven major landmasses
11
Visual representation of an area
13
Ridge of rock or coral near the surface
纵向
2
Area where water covers the soil
3
Physical features of land
4
Low area between mountains
5
Dry land with little rainfall
12
Largest river in South America